After receiving a message from Book, Burnham and Georgiou embark on a rogue mission to find him, leaving Saru to pick up the pieces with Admiral Vance. Meanwhile, Stamets forms an unexpected bond with Adira.

Sonequa Martin-Green (Commander Michael Burnham)
Doug Jones (Captain Saru)
Anthony Rapp (Lt. Cmdr. Paul Stamets)
Mary Wiseman (Ensign Sylvia Tilly)
Wilson Cruz (Dr. Hugh Culber)
David Ajala (Cleveland Booker)

Michelle Yeoh (Philippa Georgiou)

Oded Fehr (Admiral Charles Vance)
Ian Alexander (Gray Tal)
Noah Averbach-Katz (Ryn)
Blu del Barrio (Adira Tal)
Ian Lake (Tolor)

Emily Coutts (Lt. Keyla Detmer)
Patrick Kwok-Choon (Lt. Gen Rhys)
Oyin Oladejo (Lt. Joann Owosekun
Ronnie Rowe Jr. (Lt. Ronald Bryce)
Sara Mitich (Lt. Nilsson)
Julianne Grossman (Discovery Computer)
Avaah Blackwell (Captain Rahma)
Vanessa Jackson (Lt. Audrey Willa)
Daniel Jun (Lai)
Danijel Mandic (Salvage Regulator)
Antonio Ortega (Engineer)
Linford Mark Robinson (Captain L'Teis Kardashev)
David Benjamin Tomlinson (Lt. Linus)
Katherine Trowell (Captain Bandra)

• The DOTs have completed repairs on Discovery's hull, which also received upgrades including programmable matter consoles and interface upgrades. The warp nacelles were also upgraded and detached from the hull for improved maneuverability. After the refit, the registry was updated to NCC-1031-A.
  
• Adira upgrades the spore drive interface for Stamets, eliminating the need for his forearm shunts.
  
• The crew remains in the 23rd century uniforms, but they receive a 32nd century tricom badge, which functions as a communicator, holo PADD, tricorder, and personal transporter.
  
• Saru demotes Burnham from the Executive Officer position, but she remains Chief Science Officer.